integrated treatment of hepatitis c virus infection

Conditions: Hepatitis C, Chronic; Opioid Dependence, on Agonist Therapy

Summary: intro-hcv is a multicentre randomised controlled clinical trial that will compare the efficacy of integrated treatment of chronic hepatitis c virus infection (hcv) within medically assisted rehabilitation (mar) clinics providing opioid substitution therapy (ost) compared to standard treatment. the trial will recruit approximately 250 hcv infected in bergen and stavanger and about 1000 in a linked observational study. intervention: integrating diagnostic and treatment follow-up for hcv treatment into mar outpatient clinics in bergen and stavanger including testing for hcv, counselling and treatment evaluation and treatment delivery. primary objectives: compare the effect of integrated hcv treatment assessed with sustained virological response at 12 weeks between the mar outpatient clinics in bergen and stavanger (intervention arm) with standard treatment provided after referral to infectious disease clinics among patients who receive ost having hcv secondary objectives: compare treatment adherence between the intervention and control arms, and assess changes in quality of life, fatigue and psychological well-being before and after hcv treatment, as well as changes in drug use, infection related risk behavior, and risk of reinfection among those with sustained virological response. main endpoint: sustained virological response of hcv at 12 weeks (± 10 days) study population: the target group will be patients receiving care with mar from involved outpatient clinics in bergen, sandnes and stavanger who are chronically infected with hcv and eligible for treatment according to national guidelines. study duration: participants will be included and followed up at least annually for the total study duration between 2017 and 2021. expected outcome: this study will inform on the relative advantages and disadvantages of an integrated treatment program for hcv into mar compared to standard care aiming to increase access to treatment and improved treatment adherence. if the integrated treatment structure is found to be safe and efficacious, it can be considered for further scale-up.

rationale globally, about 71 million people are chronically infected with chronic hepatitis c virus infection (hcv) and approximately 700,000 are dying annually of related complications. it has been estimated to be 10-20,000 people in norway have chronic hcv. people who inject drugs represent around 75% of these, most being infected with hcv through sharing of syringes and other user equipment. hcv and hepatitis b are both among the leading causes to liver disease and transplantation worldwide. prevention and control has to date unfortunately shown to be difficult. among people with opioid addiction and hcv, a third develops severe complications within three decades. within the same group and after 50 years of age, liver disease is as common as risk of death as overdose. reports from medically assisted rehabilitation (mar) clinics delivering opioid substitution therapy (ost) in norway indicate that more than half of the patients receiving ost have a hcv. chronic hcv substantially increases the risk of severe complications such as liver failure and death within two to three decades. the mean age of ost patients in norway is 42 years and is currently increasing, and a large group have had hcv for more than twenty years. reaching these patients with treatment is of critical importance to avoid deaths and reduced quality of life, as well as preventing large costs related to future treatment of end stage liver disease. treatment for hcv has been available for several decades, and weekly injections with interferon in combination with daily ribavirin tablets for 16 to 48 weeks has until recently been the standard treatment. these medications have been shown to give frequent and to some degree serious side effects, with around 40% not achieving sustained virological response (svr). these aspects combined with a fear among many clinicians of reinfection among those being treated and an expectation of poor treatment adherence in this group, has probably been the reasons for few patients having been treated yet. however, studies assessing treatment adherence indicate good adherence among patients receiving ost. even if around 6% of those who are successfully treated among people who inject drugs are reinfected annually, treatment is not only important for those who are treated, but will also contribute to reduce the hcv infectious burden and the risk of spread within the population. during the last years, development of new highly effective tablet-based direct acting antiretroviral medications, usually being curative within 8 to 16 weeks, has radically changed the hcv treatment. these treatments have less side effects than those used earlier and give opportunities to cure most of the hcv infected. even if they are expensive, british assessments indicate that they are cost effective as universal coverage with antiretroviral treatment could prevent large expenses related to future complications. thus, the norwegian medicines agency approved many of these new antiretroviral treatments in 2014. nevertheless, a recent norwegian study indicated that only 14% of ost patients with chronic hcv had received hcv treatment. currently, the high burden of hcv among people who inject drugs is among the largest challenges within the mar field, within a group that is also underrepresented in clinical research. patients with drug addiction have a high disease burden, generally have more difficulties in obtaining adequate health care compared with the general population, on top of knowledge gaps in terms of health status and how to deliver proper treatment and follow-up. this is particularly the case among people who inject drugs. there is a need for new approaches to reach more of those in need of treatment while ensuring high-quality care. to reach patients with drug addiction, it seems to be necessary to use a model of health care focusing on interdisciplinarity, accessibility, close and frequent follow-ups. department of addiction medicine at haukeland university hospital in bergen and ost in stavanger have adopted an integrated treatment and care model for patients receiving ost with follow-up by physicians, nurses, social workers and psychologists on nearly a daily basis with observed intake of the ost medications. this model for treatment of ost patients is unique for bergen and stavanger, also in an international perspective. this makes it an excellent platform to test out integration of hcv treatment aiming to improve health and life span of a vulnerable group, and at the same time gathering knowledge which traditionally has been difficult to obtain. this research project designed as a randomised controlled trial done in parallel with an observational study will test whether integrated treatment of hcv linked to the mar outpatient clinics to patients with chronic hcv will have better outcomes in terms of reduction in hcv. the main aim of the study is to: 1. compare the effect of integrated hcv treatment between the ost outpatient clinics in bergen and stavanger (intervention arm) with standard treatment provided after referral to infectious disease clinics among patients who receive ost having hcv primary objectives * compare the proportion with sustained virological response of hcv at 12 (10 - 14) weeks between those randomised to intervention and control arms * compare the proportion initiating treatment (taking at least one tablet or collecting prescription from pharmacy) between the intervention and control arms secondary objectives * assessing the incidence and prevalence of hcv at the ost outpatient clinics in bergen, stavanger, sandnes, and at municipal primary health care clinics * compare treatment adherence between the intervention and control arms * assess the risk of reinfection among those with sustained virological response and compare between the arms * assess changes in quality of life, fatigue and psychological well-being before and after hcv treatment * assess changes in drug use and infection related risk behaviour before and after hcv treatment * estimate incidence and prevalence of hcv infection among people who inject drugs in bergen, stavanger and sandnes being followed up at ost outpatient clinics or people who inject drugs followed up at primary health care clinics * estimate incidence and prevalence of hcv infection among people who inject drugs in bergen, stavanger and sandnes being followed up at ost outpatient clinics or people who inject drugs followed up at primary health care clinics. study design and methodology hypothesis our hypothesis is that a model with integrated treatment of hcv linked to the ost outpatient clinics to patients with chronic hcv will have better outcomes in terms of reduction in hcv (sustained virological response) compared to the current model where patients are referred to a hospital outpatient clinic. general outline: the investigators will conduct a multicentre randomised controlled clinical trial without pharmaceutical industry involvement assessing integrated hcv treatment within the mar clinics compared to standard treatment. the research project will be closely integrated with clinical care, and the research activities are planned during a planned scale-up of hcv treatment. department of addiction medicine at haukeland university hospital in bergen and mar in stavanger have adopted an integrated treatment and care model for patients receiving ost. in bergen, mar outpatient clinics have been established in each district where the patients are followed up by health and social workers on nearly a daily basis with observed intake of the ost medications. every month, the mar clinics have a total of 6,000 patient visits among the approximately 500 patients. this group of patients have a large morbidity burden and have to limited degree been able to access other standard health care. each of the mar outpatient clinics is staffed by a consultant and a physician specialising in addiction medicine in addition to nurses, social workers, and several of the clinics also being staffed by a psychologist. the remaining 550 ost patients in bergen are followed up mainly in primary care clinics. a close collaboration has been established between the department of addiction medicine and the agency for addiction and mental health in bergen municipality, who is responsible for the care in several of the primary health clinics in bergen. this model for treatment of mar patients is unique for bergen, also in an international perspective. mar stavanger has a relatively similar structure. mar stavanger is responsible for the mar treatment of approximately 460 patients within their area. of these, 120 patients are linked to the mar outpatient clinic in the centre of stavanger and 70 are linked to a similar clinic in sandnes. the treatment model in bergen and stavanger is an excellent platform to test out integration of hcv treatment aiming to improve health and life span of a vulnerable group, and at the same time gathering knowledge which traditionally have been very difficult to obtain. all patients will be assessed for hcv including genotyping among those who test hcv rna positive. those who are eligible to receiving treatment in line with national guidelines, have no exclusion criteria and consent to study participation, will be randomised to either standard or integrated treatment. in standard treatment, follow-up and treatment will be given at hospital clinics. for the integrated treatment, treatment will be given at a mar outpatient clinic where they already receive care including mar. assessment of outcomes will be done 12 weeks after completed treatment and adherence will be assessed at 4, 8 and 12 weeks after initiation of treatment. main study outcomes 1. sustained virological response of hcv at 12 (10 - 14) weeks after completed treatment 2. treatment initiation milestones and duration of the study the duration of the study will be five years. ethical clearance and complete protocol will be completed within the first half of 2017. planned initiation of data collection is may 2017 with gradual scaling up of data collection throughout 2017. recruitment will continue throughout 2019 and further follow-up throughout 2021. analyses and reporting will be initiated from mid of 2018 for some of the observational studies while assessment of the trial will be conducted when at least 200 patients have completed follow-up at 12 weeks after end of treatment. study population and setting in bergen, there are mar policlinics in each district. around half of the patients have frequent contact with the outpatient clinic several times per week. a substantial proportion receive ost-medications at a local pharmacy or through their general practitioner. in addition a few receive ost-medications at the aftercare centre albatrossen, in schools or prisons. most outpatient clinics are staffed with physicians (including both non-specialists or linked consultants/specialists), psychologists, and nurses or social workers/educators. in addition, a decentralised unit has 228 patients in 18 municipalities, where most patients receive ost from a local pharmacy or through their general practitioner (gp). for more information, see https://helse-bergen.no/avdelinger/rusmedisin/rusmedisin-lar in addition, there are several patients receiving care without mar at the municipal care centres at wergeland, nesttun og gyldenpris (strax-huset). for further description of these, see https://www.bergen.kommune.no/aktuelt/tema/tiltak-mot-rus/article-109220. lar stavanger has one more centralised outpatient clinic in stavanger and a smaller clinic in the nearby city sandnes. the research project will improve understanding on how the structure of health care impacts on patient outcomes.

Eligibility criteria:
inclusion criteria: * receiving ost from included outpatient clinic * chronically infected with hcv (hcv rna positive and also hcv rna positive or anti-hcv at least 6 months before inclusion) * eligible for treatment according to national guidelines (criteria specified below) * obtaining informed consent at the time of study initiation , eligibility for treatment according to national guidelines was defined as follows: * genotype 1 and 4 independent of degree of fibrosis * genotype 2 and 3, dependent on significant fibrosis. significant fibrosis will be assessed with fibroscan indicating elastography of above 7 kpa. where elastography cannot be obtained, significant fibrosis will be assessed with ast to platelet ratio index (apri score) of \> 0.7 (http://www.hepatitisc.uw.edu/page/clinical-calculators/apri), i.e. apri = asat levels (in iu/l) / 40 (upper normal levels of asat in iu/l) / platelet count (109/l). an apri score greater than 0.7 had a sensitivity of 77% and specificity of 72% for predicting significant hepatic fibrosis. exclusion criteria: * co-infection with hiv * severe extrahepatic hcv associated diseases (e.g. cerebral vasculitis, cryoglobulinemia/membranoprolifereative glomerulonephritis (mpgn), renal failure (egfr \<30), polyarthritis) * decompensated liver failure assessed with child-pugh (cp) score (\>6 points, class b and c) * currently receiving treatment for hcv

Keywords: chronic hepatitis c opiate substitution treatment integrated delivery of health care substance abuse treatment centers